Objective attachment in microscopes



(No Model.) Y

W. H. BULLooH.

OBJECTIVE ATTAGHMENT'IN MIGROSCPES.

'fPate-nted'-Nov. 6. '1883.'

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Nrrnn STATES WALTER H. BUL'Loc-H, or CHICAGO, ILLINOIS.

OBJECTIVE ATTACHMENT IN MionosooPEs.

A SPECIFICATION forming part of Letters Patent No. 287,904, dated November v6, 1883.

Application filed September 22, 1853. (No model.)

'c @ZZ whom it may concern Be it known that I, WALTER H. BULLocH,

of the city of Chicago, VCook county, Illinois,

" power for one of higher or lower. The at- IIS tachment must be made in such ay manner that the part cannot be easily disarrangedA by nianipulating with the instrument, but capable of easy disconnection when required. .For this purpose l have devised the attachment shown in the accompanying drawings, in Which- Figure l shows a perspective view of the lens mounting and attachment complete; Fig.

2, a perspective view'of the upper portion of the device; Fig. 3, a perspective view of the lower portion of the device; Fig. 4, a vertical section of complete device inverted; Fig. 5, ring A shown in perspective.

The part Fig. 3 consists of a collar or ring, D,made tdfit securely,by screw or otherwise, the upper end of an objective, and form with it substantially one piece. This ring has on its outside one or more projections, spurs, or catches, as shown at F. The ring D is formed to fit in the anged piece H, which'is provided with radial slots or cavities E. These are somewhat deeper than the thickness of the spurs F; The part H is inclosed by an outer ring, A, shown`in perspective by Fig. 5,) and consisting of a ring having flanges on its inner portion. This iiange is out away to admit of the spurs F of the ring D, and is constructed to retain the spurs F of the ring D when such ring is properlyr inserted in the piece II, and the ring A turned to the right or left, it being fitted so that it can freely turn, and the angular movement limited, if desired, by any convenient stop.

In using the device, which can either be part of the usual portion of the microscope-body or a separato attachment 'fitted by the part N,

in the usual manner, to the nosepiece of the microscope-that is,'by an outside threaded screw-the ringD has an inner threaded space, into which the objective is iitted. The obj ective, with its spurs, is now placed in the cavity of the ring II, the uncut part of the ange or spurs of the ring A having been so adjusted that the spurs F can enter them. II' the ring A is turned,its project-ing spurs will close the cavity where the spurs F entered and secure the ring D with the objective in its desired place.

Having thus described my invention, what I cla-iin as new, and desire to secure by Letters Patent, is-

l. The inner ring, D, with outward-projecting spurs, middle ring, H, with spur-cavities, and outer ring, I with inwardprojecting spurs, substantially as herein shown aud dcscribed. l Y

2. In combination with the objective of a microscope, the spurs F and rings II and A, the former fitted and adjusted to fit in and be secured by the latter, substantially as and for the purpose described.

.- i VALTER H. BULLOGH.

YVitnesses:

Ti-Ios. B. JEFFERY, Greis. S. Nnnnos. 

